1 /* 2 * LCD device support. 3 * 4 * Copyright (C) 2018 Paul Boddie <paul@boddie.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of 9 * the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA 20 */ 21 22 #pragma once 23 24 #include <l4/devices/display-client.h> 25 #include <l4/devices/lcd.h> 26 27 #include <l4/re/c/video/view.h> 28 #include <l4/sys/types.h> 29 30 31 32 #ifdef __cplusplus 33 34 #include <l4/re/dataspace> 35 #include <l4/sys/capability> 36 37 class Lcd_device 38 { 39 protected: 40 /* LCD peripheral abstraction. */ 41 42 Lcd_chip *_chip; 43 44 /* Display server abstraction. */ 45 46 L4::Cap<Display_device_interface> _display; 47 48 /* Framebuffer virtual and physical addresses. */ 49 50 l4_addr_t fb_vaddr, fb_paddr; 51 52 /* Memory capability for the framebuffer. */ 53 54 L4::Cap<L4Re::Dataspace> _fbmem; 55 56 /* Display operations. */ 57 58 virtual void disable_display(); 59 virtual void enable_display(); 60 61 public: 62 /* Initialise a device with a controller and display object reference. */ 63 64 Lcd_device(Lcd_chip *chip, L4::Cap<Display_device_interface> display) 65 : _chip(chip), _display(display) 66 { 67 /* Subclasses must set up any memory. */ 68 } 69 70 /* Framebuffer operations. */ 71 72 virtual l4_addr_t get_framebuffer() 73 { 74 return fb_vaddr; 75 } 76 77 virtual L4::Cap<L4Re::Dataspace> get_framebuffer_cap() 78 { 79 return _fbmem; 80 } 81 82 /* Querying operations. */ 83 84 virtual l4_size_t get_framebuffer_size() = 0; 85 virtual void get_view_info(l4re_video_view_info_t *view_info) = 0; 86 87 /* Device operations. */ 88 89 virtual void disable() = 0; 90 virtual void enable() = 0; 91 92 /* Device access. */ 93 94 static Lcd_device *get_device(); 95 }; 96 97 #endif 98 99 100 101 /* C language interface. */ 102 103 EXTERN_C_BEGIN 104 105 void *lcd_get_device(void); 106 l4_addr_t lcd_get_framebuffer(void *lcd); 107 l4_size_t lcd_get_framebuffer_size(void *lcd); 108 void lcd_get_view_info(void *lcd, l4re_video_view_info_t *view_info); 109 void lcd_disable(void *lcd); 110 void lcd_enable(void *lcd); 111 112 EXTERN_C_END